Abstract

We implement magnetic resonance force microscopy (MRFM) in an experimental geometry, where the long axis of the cantilever is normal to both the external magnetic field and the rf microwire source. Measurements are made of the statistical polarization of in polystyrene with negligible magnetic dissipation, gradients greater than within 100 nm of the magnetic tip, and rotating rf magnetic fields over 12 mT at 115 MHz. This geometry could facilitate the application of nanometer-scale MRFM to nuclear species with low gyromagnetic ratios and samples with broadened resonances, such as In spins in quantum dots.

Received 02 February 2011Accepted 19 March 2011Published online 18 April 2011

Acknowledgments:

Data shown in Fig. 1 were taken in Dr. Dan Rugar’s laboratory at IBM Almaden. We acknowledge support from the Canton Aargau, the Swiss NSF (Grant No. 200021 1243894), and the Swiss Nanoscience Institute.